I will fix java and python bugs with root cause analysis

N
nie_chenguang
N
nie_chenguang
Neil
fix java and python bugs with root cause analysis
Full Screen
fix java and python bugs with root cause analysis
Full Screen
Full Screen
fix java and python bugs with root cause analysisfix java and python bugs with root cause analysisfix java and python bugs with root cause analysis

About this gig

Bugs don't fix themselves but they CAN'T hide from root cause analysis.


I'm a Staff Engineer with 7 years of experience across Java and Python stacks. I've built workflow engines and low-code platforms from scratch which means I know exactly where complex bugs love to hide.


WHAT I FIX:

Java / Spring Boot: NPE, Bean injection errors, transaction issues, concurrency bugs, startup failures

Python: runtime errors, FastAPI/Django issues, data processing bugs

API errors, config problems, memory leaks, performance bottlenecks


MY APPROACH:


1. Reproduce your bug quickly

2. Trace logs & thread dumps to find the TRUE root cause (not just symptoms)

3. Fix it cleanly, with minimal changes to your code

4. Explain what happened in plain language

WHY ME:

7 years fixing production incidents for enterprise platforms serving real users

Root-cause driven: I don't patch symptoms, I eliminate the problem

Clear communication in every update


MESSAGE ME BEFORE ORDERING send your error logs/screenshot, and I'll tell you exactly which package fits your bug. Let's kill that bug today.

  • Programming language

    • Python

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Security
    • Design
    • Databases

  • Frontend framework

    • Next.js
    • React.js
    • Vue.js

  • Backend framework

    • Django
    • FastAPI
    • Flask
    • Spring
    • Supabase

Get to know Neil

Neil

Staff Engineer

  • FromChina
  • Member sinceOct 2026

  • Languages

    Chinese, English, Japanese
Staff Engineer with 7 years of experience, working across both Java and Python stacks. Led the 0-to-1 development of a low-code platform with self-built workflow and data-flow engines. In recent years, focused on Agent Engineering and AI Native development practices. Expert in complex bug triage and root-cause analysis, with strong skills in production incident troubleshooting, distributed-system diagnostics, and performance tuning. I offer platform architecture design, workflow engine implementation, knowledge graph construction, and Agent engineering services.

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